#include<iostream>
#include<string>
using namespace std;class Sum
{
public:
Sum(){}
Sum(string at) {a=at;}
Sum operator+(Sum &b);
void show();
private:
string a;
};
Sum Sum::operator +(Sum &b)
{Sum c;
int i;
for(i=0;i<6;i++)
c.a[i]=a[i]+b.a[i];
return c;
}
void Sum::show()
{int i;
for(i=0;i<6;i++)
cout<<a[i]<<endl;
}
int main()
{Sum A("123456"),B("123456"),c;
c=A+B;
c.show();
return 0;}